View source for Properties of rectangles - perimeter and area

[[File:justanidea.png|link=|250px]]{{DISPLAYTITLE:Perimeter and area}}
{{Rinfo
|type= Lesson idea	
|attribution= {{Bjoern Hassler}} 
|title= Exploring properties of rectangles: Perimeter and area.
|topic=Polygons, perimeter, area
|subject=Maths
|resourcenumber=M0025
|age= Secondary, Primary
|image=rectanglesidea.jpeg
|tagline=Do two rectangles that have the same area also have the same perimeter?
|content= The lesson idea is about a mathematics investigation, where students explore whether two rectanges that have the same area also have the same perimeter. This is of course not the case, but nevertheless it can be a misconception. Students initially vote, then do an investigation, and finally vote again as well as present their conclusions. The investigation offers an opportunity for same-task group work.
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|additional resources= 
* [http://www.geogebra.org/cms/ Geogebra] or another maths package could be used
* [http://www.geogebratube.org/student/m14272 Example of a related Geogebra file]
|useful information=
|related resources= 
|other=
|final=yes
|resources= Questions to investigate: 
* Do two rectangles that have the same area also have the same perimeter?
* How many properties of a rectangle (eg height, width, area, perimeter) need to be fixed to fully determine its other properties?
* What configuration maximises the perimeter of a rectangle? 
* What configuration maximises its area?
|licence=
|final=yes
}}